Add support for PHP 8

[akondas]

Description

Adding support for PHP 8

Motivation and context

Installing the package on an environment with PHP 8

How has this been tested?

With run_tests.sh helper

Screenshots (if appropriate)

Types of changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

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[trizz]

Hi @akondas,

Thanks for your PR! I'll merge it to master, but I'm not tagging a release yet, as there are some more changes we like to add before releasing a new version. I'll expect a new release in the first or second week of january.

[akondas]

Thanks for info 👍